Affected shrimp show opaque white areas on the abdomen (Fig. 6-3); blacken-ing on the edges of the uropod followed by erosion and liquid-filled boils at the tip of uropods in advanced stages; “wood grain” appearance of abdominal muscle in postlarvae (Fig. 6-4).

EFFECTS ON HOST:

There is a gradual death of cells of affected parts leading to erosion especially in the tail. This may then serve as portal of entry for secondary systemic bacte-rial infection.

PREVENTION AND CONTROL:

Reduce stocking density and improve water quality by daily water change (5-10%)